//
// server.cpp
// ~~~~~~~~~~
//
// Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#include "server.hpp"
#include <boost/thread/thread.hpp>
#include <boost/bind.hpp>
#include <boost/shared_ptr.hpp>
#include <vector>

namespace http {
namespace server3 {

server::server(const std::string& address, const std::string& port,
    const std::string& doc_root, std::size_t thread_pool_size, const std::string& log_name)
	: thread_pool_size_(thread_pool_size),
	signals_(io_service_),
    acceptor_(io_service_),
    new_connection_(),
    request_handler_(doc_root),
	server_log_(log_name)
{
	// Register to handle the signals that indicate when the server should exit.
	// It is safe to register for the same signal multiple times in a program,
	// provided all registration for the specified signal is made through Asio.
	signals_.add(SIGINT);
	signals_.add(SIGTERM);
#if defined(SIGQUIT)
	signals_.add(SIGQUIT);
#endif // defined(SIGQUIT)
	signals_.async_wait(boost::bind(&server::handle_stop, this));

	// Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
	boost::asio::ip::tcp::resolver resolver(io_service_);
	boost::asio::ip::tcp::resolver::query query(address, port);
	boost::asio::ip::tcp::endpoint endpoint = *resolver.resolve(query);
	acceptor_.open(endpoint.protocol());
	acceptor_.set_option(boost::asio::ip::tcp::acceptor::reuse_address(true));
	acceptor_.bind(endpoint);
	acceptor_.listen();

	start_accept();
}

void server::run()
{
	// Create a pool of threads to run all of the io_services.
	std::vector<boost::shared_ptr<boost::thread> > threads;
	for (std::size_t i = 0; i < thread_pool_size_; ++i)
	{
		boost::shared_ptr<boost::thread> thread(new boost::thread(
		boost::bind(&boost::asio::io_service::run, &io_service_)));
		threads.push_back(thread);
	}

	// Wait for all threads in the pool to exit.
	for (std::size_t i = 0; i < threads.size(); ++i)
		threads[i]->join();
}

void server::start_accept()
{
	new_connection_.reset(new connection(io_service_, request_handler_, server_log_));
	acceptor_.async_accept(new_connection_->socket(),
		boost::bind(&server::handle_accept, this,
		boost::asio::placeholders::error));
}

void server::handle_accept(const boost::system::error_code& e)
{
	if (!e)
	{
		new_connection_->start();
	}

	start_accept();
}

void server::handle_stop()
{
	io_service_.stop();
}

} // namespace server3
} // namespace http
